JP2001207469A - Manhole repair method and manhole repair device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and sanitarily execute an inexpensive manhole for a short period and repair the manhole into the dense structure of high strength. SOLUTION: When the deteriorated manhole 1 is repaired, the inner wall 2 of the manhole is cleaned, after a water absorption prevent agent is applied, a cylindrical form 7 is installed concentrically with the inner wall 2 in assembling and disassembling structure, and the bottom part 3 of the manhole, an inflow pipe 4, an outflow pipe and the form 7 are sealed by a sealant. A press fitting pump is connected to the filling part 16 of the downward side of the form 7, and a fluidizing restoring reinforcing material is press-fitted and filled. A filling space S defined by the repair face of the inner wall 2 of the manhole and the inside face of the form 7 is continuously filled with the restoring reinforcing material, since the air of the filling space S is pushed upward to be discharged from a filling detection part 24 or the like, mixture of the air to the restoring reinforcing material is suppressed, and makes a structure without any hollow and any joint. Since the restoring reinforcing material is filled at high pressure, the connection of the repair face of the inner wall 2 is strong, and makes the prudent structure. After removal, the device makes the structure superior in waterproofness, strength or the like by applying a cement-based crystal breeding waterproof agent in the regenerated inner wall 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for repairing a manhole (commonly called a manhole) in a sewerage facility such as a sewage pipe system and a rainwater pipe system, and more particularly, to a structure in which the inner wall of an aged manhole is made strong. The present invention relates to a method for repairing human holes and a device for repairing human holes.

[0002]

2. Description of the Related Art In sewerage facilities, human holes are provided for workers to enter pipes at various places in order to inspect, clean, repair, etc. the pipes. Human holes are usually made of concrete, and the inner wall is constantly exposed to acidic components contained in sewage, rainwater, etc., especially hydrogen sulfide, sulfur oxidizing bacteria, sulfates, etc., so that the inner wall gradually dissolves and erodes over time. You. As a result, the human hole which has been installed for a long time, the surface layer of the inner wall is deteriorated and weakened, and the inner wall is dropped and falls off, and the inner wall becomes thin, so-called aging. For example, FIG. 12 is a cross-sectional view of an aged human hole 1 in a sewage pipe sewerage facility. As shown in this figure, the inner wall 2 of the human hole 1 is entirely thin with an uneven surface. If this state is left, the inner wall 2 will eventually collapse, and the entire human hole 1 will have to be replaced. In addition, the human hole 1 shown in FIG. 12 has a cylindrical shape at the time of installation, the bottom part 3 is formed as an inclined inner part, and the upper part has a truncated cone shape. An inflow pipe 4 and an outflow pipe (not shown) are connected to the part of the bottom 3 at the interior part so as to face each other, and after the sewage flowing from the inflow pipe 4 stays in the human hole 1, the outflow pipe ( (Not shown). On the inner wall 2 above the intermediate portion of the human hole 1, a foothold metal fitting 5 for an operator to enter and exit is attached. In the part opened to the ground,
The human hole cover 6 is detachably mounted.

[0003] Conventionally, in order to repair aging human holes,
After cleaning the inner wall and removing the degraded surface layer by hanging work, etc., and performing preparation processing such as cutting and removing footwear, repair of the cement-based restoration strengthening material (hereinafter referred to as restoration strengthening material) to the inner wall is performed. A repair technique of repairing the surface by applying it manually and pouring it is generally employed. However, the finished surface of the inner wall is non-uniform, the construction period is long, the cost is high, and the casting operation takes a long time, and the construction worker is exposed to toxic gas such as hydrogen sulfide for a long time, which is not preferable in terms of safety and health. And so on.

In recent years, to solve these problems,
A repair technique has been proposed in which a casting operation of a restoration reinforcing material is performed using a formwork. This repair technique includes cleaning, hanging work,
Preparations such as removal of footwear are performed in the same manner as above, and assembly and
By installing a cylindrical form with the disassembly structure concentrically with the inner wall, and pouring the reinforcer from the top into the filling space defined by the inner wall and the inner surface of the form, the restoration reinforcing material is poured. I'm going to do it.

[0005]

According to the repair technique using the formwork, the finished surface is more uniform, the construction period is shorter, the cost is lower, and the health and safety is lower than the repair technique in which the restoration reinforcing material is applied and cast. It is possible to construct it. However, when the restoration reinforcing material is poured, it is difficult to discharge air from the filling space smoothly, so that there is a tendency that the air is confined in the restoration reinforcing material while being poured. In addition, tamping work is performed while pouring, but since the filling space is narrow and tamping is not sufficient, it is difficult to densely fill the restoration reinforcing material. As a result, voids are generated in the surface layer portion of the regenerated inner wall, that is, the regenerated surface layer portion, and the density tends to be uneven and insufficient. In addition, it is difficult to pour the restoration reinforcing material in a state where the formwork is set up to the upper part of the human hole, and it is usually two to three.
Since the pouring is performed while setting the formwork in three times, seams in the height direction are likely to occur in the reproduction surface layer portion. Therefore, it is difficult to say that the strength of the regenerated surface layer is not always sufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and its object is to provide an inexpensive, safe and hygienic construction with a short construction period, and to regenerate a dense inner wall having excellent strength. An object of the present invention is to provide a hole repair method and a human hole repair device.

[0007]

In order to solve the above-mentioned problems, according to the present invention, a cylindrical form is installed concentrically along an inner wall, and a flow-type kneaded so as to be easily flown, that is, a high flow-type restoration is enhanced. The material is press-fitted and filled into the filling space from outside the mold below the human hole. Since the restoration reinforcing material has a high fluidity and is pressed and filled at the lower side of the human hole, the restoration reinforcing material spreads to all corners of the filling space, and the air rises upward by gradually rising the filling space. Extrusion suppresses air from being mixed into the restoration reinforcing material. Further, as the filling height increases, the filling pressure increases, and a large compressive force is applied to the restoration reinforcing material. As described above, a regenerated surface layer having a dense structure without cavities or seams is formed on the inner wall.

The method for repairing human holes according to the present invention is a method for repairing human holes by cleaning and removing the deteriorated surface layer from the inner wall to complete the preparatory treatment, and then pouring a restorative reinforcing material on the inner wall to regenerate the human hole. Then, a cylindrical formwork is installed concentrically with the inner wall, and a high-fluidity restoration reinforcing material is pressed into the filling space from the outside of the formwork below the human hole and filled, thereby restoring the inner wall. The reinforcement is cast. At this time, it is preferable to use a non-shrink grout material mixed with a bactericidal agent against sulfur oxidizing bacteria as the restoration strengthening material, and a regenerated surface layer having excellent sulfate durability is formed. The surface of the regenerated surface layer may be coated with a cement-based crystal growth-type waterproofing material, in particular, a surface reinforcement made of portland cement and a cement-based crystal growth-type waterproofing material containing silica compound as a main component. And a structure having excellent water impermeability is formed.

The repair device for a human hole according to the present invention has a structure in which a cylindrical form is installed concentrically with the inner wall by an assembling / disassembling structure when the deteriorated inner wall is repaired, and a high-flowing restoration reinforcing material is filled in the filling space. A human hole repairing device that press-fits and fills with a press-fitting means and places a reinforcer on the inner wall. The reinforcer is press-fitted and filled in the form from the outside of the form below the manhole into the filling space. Filling section is provided. At this time, the filling portion is provided with a filling port formed in a form penetrating the mold, a filling pipe communicating with the filling port and protruding outside the mold and connecting the press-fitting means, a filling port and the filling pipe. May be provided with a gate valve that communicates and shuts off the valve. By closing the gate valve after the filling is completed, the backflow of the filled restoration reinforcing material is prevented, and a treatment after the filling, for example, an operation of removing the filling tube and the press-fitting means can be easily performed. The gate valve is preferably provided so as to slide along the outer surface of the formwork. The regeneration surface layer is formed on a smooth surface with a small protrusion at the filling site, and the work of removing the formwork is performed. Can be performed smoothly.

[0010] It is preferable that the formwork is provided with a filling detecting section for detecting the filling height of the restoration reinforcing material. The filling detection unit includes a detection port formed in the form of a penetrating shape, a detection tube communicating with the detection port and protruding outside the form, and a partition for communicating and blocking the detection port and the detection tube. A valve may be provided, and leakage may be prevented by closing the gate valve when the restoration reinforcing material reaches the detection port. A lid may be detachably provided on the free end side of the detection tube, and a detection hole may be formed so that the restoration reinforcing material filled in the lid may leak, and leakage of the restoration reinforcing material from the detection hole may be performed. The filling height can be detected. The lid may be provided with a spacer for holding the mold at a predetermined distance from the repair surface of the inner wall. The spacer is preferably provided so as to be axially adjustable with respect to the lid, and can be easily adjusted corresponding to the position of the formwork with respect to the inner wall.

Further, it is preferable that each member is formed in the same manner as the filling portion, and the filling detecting portion is filled from a plurality of places having different heights in view of the relationship between the performance of the press-fitting means and the flowability of the restoration reinforcing material. If necessary, it can be used as a filling part. That is, when filling has progressed to the filling detection unit, the press-fitting means is removed from the filling unit and connected to the filling detection unit,
Refill from the filling detector. Thus, it is not necessary to use a plurality of types of press-fitting means having different horsepowers, and the apparatus can be made compact. In addition, since refilling can be performed from the filling detection section in a short time after filling from the filling section, a seam does not occur between the restoration reinforcing materials, and a continuous structure can be cast.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram conceptually illustrating an embodiment of a human hole repair method according to the present invention, and shows a case of repairing a conventional aging human hole shown in FIG. In FIG. 1, 1 is a human hole of a sewage pipe system sewerage facility, 2 is an inner wall, 3 is a bottom portion, 4 is an inflow pipe, 5 is a foothold, and 6 is a human hole cover. The manhole 1 shown in FIG. 1 diagnoses the deterioration state of the inner wall 2 in the same manner as the conventional one, and prepares a construction plan, prepares the construction, and prepares the construction plan. In a state where preparation processing has been performed based on. The preparatory treatment is a treatment performed to cast a restoration reinforcing material. The surface of the inner wall 2 is washed by jetting water with a high-pressure washing machine to remove the surface layer which has become brittle due to sulfuric acid degradation. The hook 5 is cut and removed, and a water absorbing agent (MS agent) is applied to the repaired surface of the inner wall 2 by spraying or the like in order to suppress dryout of the restoration reinforcing material and secure good adhesiveness. ing. The work of removing the deteriorated surface layer of the inner wall 2 is performed as follows.
The hanging work may be performed.

Numeral 7 denotes a steel plate-shaped form, the shape of the inner surface of which corresponds to the shape of the inner wall 2 of a new human hole as shown in FIG. 2, and a new shape as shown by a two-dot chain line in FIG. Are arranged concentrically at a position corresponding to the inner wall 2 of the human hole. The structure of the mold 7 is a disassembly / assembly structure, and includes four mold members of a first-stage mold member 8, a second-stage mold member 9, a third-stage mold member 10, and a fourth-stage mold member 11. Are integrally assembled so as to have the above-mentioned shape. First to third stage form members 8, 9, 10
Has a cylindrical inner surface having the same diameter, and the uppermost fourth stage mold member 11 has a truncated cone shape. The assembling of the form members 8, 9, 10, 11 in each step is performed, for example, as shown in FIG. 3 in a state where the second-stage form member 9 is assembled to the first-stage form member 8. The edges 12 are formed by projecting outward in the radial direction, and are pressed and sandwiched by a hairpin-shaped clip 13 to be integrally fixedly connected. The clip 13 is formed by bending a wire into a hairpin shape so that one side is slightly longer than the other, bending the long end of the wire toward an extension of the other side at a substantially right angle, and forming the side of the hairpin-shaped bent portion. Formed in a direction intersecting the direction in which the hairpin is bent into a hairpin shape, and having a long end portion formed in the edge portion 12 of the first and second formwork members. 14 and rotate about this end to
The two are pressed and pinched. Also, the first to first
The three-stage form members 8, 9, 10 are assembled into a cylindrical shape by combining form elements 15 divided into six in the circumferential direction.
As shown by a dotted line in FIG. 2, an edge 12 is formed on the periphery of each of the form elements 15 so as to be continuous with the upper and lower edges 12. Are fixedly connected together by the same clip (not shown) as above. The fourth-stage form member 11 is the same as the other-stage form members 8, 9, and 10 except that the fourth-step form member 11 is assembled into a truncated cone shape by combining form elements 15 divided into six in the circumferential direction. It is fixedly connected by a clip (not shown). Formwork 7
Is the edge 1 of the side of the adjacent formwork element 15 as described above.
The upper and lower edges 12 of the form members 8, 9, 10, and 11 of each stage are strongly pressed and sandwiched by a clip 13 to be integrated, and a high-fluidity restoration reinforcing material is applied to the repair surface of the inner wall 2. Formwork 7
When press-fitting and filling at a high pressure into the filling space S defined by the outer surface of the sealing material, a sealing property to the extent that it is difficult to leak out is secured.
Note that fixing means such as bolts may be used instead of the clip 13.

The installation of the mold 7 in the human hole 1 is performed by assembling the first-stage mold member 8 in the human hole 1 and fixing it to the bottom 3, and placing the second-stage mold member 8 on the first-stage mold member 8. This is performed by assembling the frame member 9 and sequentially assembling the third-stage mold member 10 and the fourth-stage mold member 11 in the same manner. When the first-stage form member 8 is fixed to the bottom 3 of the human hole, a padding is inserted between the first-stage form member 8 and the bottom 3 because the surface of the bottom 3 is usually uneven. To secure the installation height and horizontal level, but to repair the portion on which the first-step form member 8 is to be placed with a relatively hardened paste-like restoration reinforcing material, or to provide a pedestal at the bottom 3 etc. May be installed. After the first-stage form member 8 is set in place, as shown in FIG. 4, between the outer periphery of the lower end of the first-stage form member 8 and the inner wall 2 and the bottom 3, and between the first-stage form member 8 and the inflow pipe 4. And a discharge pipe (not shown) are sealed with a sealing material V formed by applying a paste-like restoration reinforcing material kneaded relatively hard, and the filling space S leaks out of the filling space S. It is formed in a difficult space. The sealing material V may be made of another material such as a foamed resin material such as urethane foam or a rubber material.

Reference numeral 16 denotes a filling section for press-fitting and filling the filling space S, which is provided in the first-stage form member 8. As shown also in FIGS.
The filling tube 18 is formed in a penetrating manner to the outside of the first frame member 8 so as to communicate with the filling port 17, and is attached by a mounting flange 19. Filling tube 18
Consists of a pipe body with a thread cut on the free end side, and a supply hose 2 of a press-fit pump (not shown) for supplying a restoration reinforcing material.
2 are connected by a threaded pipe joint 21. The mounting flange 19 has a U-shaped cross section as shown in FIG.
The gate valve 23 is slidably mounted in the space between the first stage frame member 8 and the outer surface of the first stage frame member 8. The gate valve 23 communicates the filling port 17 with the filling pipe 18.
5 and 6 so as to be switched between an open state shown by a solid line and a closed state shown by a two-dot chain line. The shape of the gate valve 23 is
Is formed in an arc shape along the outer surface of the mold 7 and slides in close contact with the outer surface of the formwork 7. At the time of filling, by opening the gate valve 23, the filling port 17 and the filling pipe 18 communicate with each other, so that the restoration reinforcing material from the press-fitting pump (not shown) can be press-fitted into the filling space S and filled. Become. At the end of filling, the gate valve 23 is closed so that the filling port 17 is closed.
And the filling tube 18 are shut off, and the restoring reinforcing material press-fitted and filled can be held so as not to flow back from the filling space S. Since the filling portion 16 is provided on the first-stage form member 8 on the lower side when viewed from the entire form 7, the press-fitting and filling of the restoration reinforcing material is performed on the lower side of the form 7, that is, a human hole. 1 from below.

Reference numeral 24 denotes a filling detecting section for detecting the filling height of the restoration reinforcing material press-fitted and filled into the filling space S, and a plurality of positions are provided at each of the form members 8, 9, 10, and 11 in each stage. Are provided one by one. The structure of the filling detector 24 is, for example, as shown in FIGS. 7 to 9 provided in the third-stage frame member 10, in which the detecting port 25, the detecting pipe 26, the mounting flange 27, and the gate valve 28 are connected to the filling unit 16. The lid 29 is screwed to the free end of the detection tube 26. At the center of the lid 29, a spacer 30 is attached with two nuts 31 so that the amount of protrusion can be adjusted, and a detection hole 32 is formed on the side of the spacer 30. The spacer 30 holds the form members 8, 9, 10, 11 of each step at a position concentric with the inner wall 2, and forms the form members 8, 9, 1 of each step.
The gate valve 28 is opened each time 0 and 11 are assembled, and the lid 29 is opened.
Is attached to the detection tube 26, and the tip is attached to the inner wall 2 as shown in FIG.
Is set in a state of contact with the repair surface of each stage, so that the form members 8, 9, 10, and 11 of each stage are assembled and press-fitted.
At the time of filling, it is held concentrically with the inner wall 2.
The detection hole 32 leaks after passing through the detection port 25 and the detection tube 26 when the restoration reinforcing material rises to the filling detection unit 24, and thus the filling height can be detected. Then, after the detection, the lid 29 is removed, and the gate valve 28 is moved to the position shown in FIGS.
Is moved to the closed state as shown by the two-dot chain line. Thereby, since the detection port 25 is closed, leakage of the restoration reinforcing material is prevented. At that time, the spacer 30 is also removed,
The mold 7 is maintained concentric with the inner wall 2 by the filled restoration strengthening material after the filling detection unit 24 has been filled.

By the way, the filling detecting section 24 not only detects the filling height but also the spacer 30 as described above.
, And also serves as an air vent for removing air from the filling space S at the time of filling, and can be used as a filling portion by removing the lid 29 and connecting the supply pipe 20. If the spacer 30 does not need to be attached, the lid 29 can be omitted or the lid 29 with the spacer 30 removed can be attached. Tube 2
By leaking from the end of No. 6, it is possible to detect that the filling detection unit 24 has been filled.

As described above, in the conventional repair work for the deteriorated human hole 1 shown in FIG. 12, the preparation form is prepared based on the construction plan, and then the formwork 7 is installed concentrically with the inner wall 2 of the human hole. However, the subsequent steps are as follows. First,
A press-fit pump (not shown) is connected to the filling section 16 provided on the installed formwork 7. The press-fit pump (not shown) is connected by connecting the supply pipe 20 to the filling pipe 18 by a threaded pipe joint 21 and is connected to the filling space S in a communicating manner. Next, the press-fitting pump (not shown) is operated to supply the high-flow restoration strengthening material to the filling space S. The restoration reinforcing material is sequentially press-fitted and filled into the filling space S from below through the filling portion 16.

Incidentally, as the restoration strengthening material, a high-performance non-shrink grout material mixed with a bactericidal agent, for example, Master Flow 5
40H grout (trade name of NV Corporation, hereinafter referred to as KB540-H material) is used.
KB540-H is a non-shrink grout material used for seismic retrofitting work and installation of various structures in the field of civil engineering and construction. It is a premix product in which the main components such as cement, aggregate, and admixture have been previously adjusted. is there. Aggregate is 2.5m
It is a hard siliceous aggregate adjusted to a particle size of m or less and kept in a completely dry state. The admixture is a mortar shrinkage compensator composed of calcium-sulfo-aluminate components,
Made of powdered silica-based strength enhancer, water-reducing high-strength admixture mainly composed of aromatic water-reducing agent, antibacterial agent mainly composed of nickel-based and / or tungsten-based chemicals I have. Mortar shrinkage compensation material, entry down Gaito _{(3CaO · Al 2 O 3 ·} CaSO 4 · nH 2 O) is an effect of correcting the expansion to contraction of the grout during the crystal growth. The strength enhancer has the effect of reacting with the hydration product of cement to increase long-term strength. The water-reducing, high-strength admixture prevents the separation of each material by improving the dispersion in the kneaded water in the form of granules such as cement and aggregate, and the softness required for construction can be obtained with less water. Has an effect of promoting hydration by the dispersion of, thereby stabilizing the expression of the initial strength and the long-term strength. The antibacterial agent has an effect of preventing bacteria against sulfur-oxidizing bacteria generated from sewage and suppressing deterioration of concrete by sulfuric acid.

Since the KB540-H material is obtained by mixing an aggregate and an admixture with cement as described above, it has the following characteristics or characteristics. The mixture becomes highly fluid by adding only a small amount of water and mixing. By the action of the water-reducing high-strength admixture, water may be added at a weight ratio of 25: 3.2 to 3.9,
The softness required for construction, that is, the consistency becomes a flowable state with a J14 funnel of 5 to 11 seconds, and the filling space S can be densely filled to every corner. It is difficult to separate materials. By the action of the water-reducing and high-strength admixture, powders and granules such as cement and aggregate are kneaded and dispersed well in water, and the bond between the materials is strengthened. High strength (eg, 40 N / mm ² or more at 28 days of age) and excellent durability. The strength enhancer reacts with the hydration product of the cement to increase the long-term strength, and the action of the water-reducing and high-strength admixture disperses the cement to promote hydration, thereby developing the initial strength and improving the long-term strength. Since the stabilization is achieved, the structure has high strength and excellent durability. Controls concrete corrosion. By the action of the antibacterial agent, the respiration of sulfur-oxidizing bacteria and the like is suppressed, the generation of sulfuric acid is suppressed, and deterioration due to corrosion of concrete is prevented. Does not shrink when solidifying. When solidified, the cement shrinks, but the ettringite in the shrinkage compensating material expands due to crystal growth, and as a whole, solidifies without shrinkage to compensate for the shrinkage of the cement.

When such a restoration reinforcing material is press-fitted and filled into the filling space S by a press-fitting pump (not shown), the lower part of the filling space S is defined by the inner wall 2 of the human hole, the bottom 3 and the mold 7. Since the mold 7 and the bottom 3 of the human hole, the inflow pipe 4 and the outflow pipe (not shown) are sealed with the sealing material V, the restoration reinforcing material may leak from the filling space S. Instead of filling. As the filling height rises, the liquid gradually leaks from the detection hole 32 of the lower filling detecting section. Every time the liquid leaks, the lid 29 is removed from the detecting tube 26 and the gate valve 28 is closed. Thereafter, while detecting the filling height as described above, the form 7
Is filled to the top, and when the top is reached, the operation of the press-fit pump (not shown) is stopped.

At the time of press-fitting / filling, the restoration reinforcing material sequentially rises from the lower side of the filling space S to push up the air in the filling space S, and this air is discharged from the detection holes 32 of each filling detecting portion. Is done. Since the air is discharged smoothly, there is very little air entrapment in the restoration restoration material to be filled, and since it is press-fitted and filled at a high pressure, the restoration restoration material after filling has a dense structure without cavities. Become. Note that an air release hose (not shown) may be connected to one of the filling detectors 24 of the fourth-stage form member 11, and the air may be forcibly discharged by an air pump (not shown). In this case, immediately after the restoration reinforcing material has risen to the filling detecting section 24 of the third-stage form member 10, the operation of the air pump (not shown) is stopped, and the gate valve 28 of the filling detecting section is closed. State. Thus, only the air can be discharged without sucking out the restoration reinforcing material. In addition, lid 2
The spacer 30 is also removed together with the spacer 9, but since the spacer 30 has already been filled up to the mounting position, the position of the mold frame 7 does not shift and is maintained concentric with the inner wall 2.

After completion of the press-fitting and filling, the press-fitting pump (not shown) is removed from the filling portion 16, and the restoration reinforcing material is left to cure for 4 to 6 days, solidified, and then released. The demolding is performed by disassembling the fourth-stage mold member 11 into six mold elements 15 as described above, and thereafter, the third-stage mold member 10, the second mold member 9 and the first mold member 8 are separated. It is performed by disassembling in the same manner. At this time, the restoration strengthening material is solidified in a state of having entered the filling section 16 or the filling detection section 24. However, since the gate valve 23 of the filling section and the gate valve 28 of the filling detection section are in a closed state during curing, the restoration restoration is performed. The amount of the reinforcing material entering is equivalent to the thickness of the filling port 17 or the detecting port 25, that is, the thickness of each mold element 15, and is extremely small. Therefore, the filling unit 16 or the filling detecting unit 2
Each of the form elements 15 provided with 4 can be easily and quickly removed in the same manner as the form elements 15 of other parts.

The restoration strengthening material after demolding becomes the regenerated surface layer portion X of the inner wall shown in FIGS. 10 and 11, and is formed by continuously injecting and filling the high-flowing restoration strengthening material at a high pressure. Because of this, it has a dense structure with no cavities due to a seamless continuous integral structure. Further, it penetrates deeply into the cracked portion of the repair surface of the inner wall 2, has a synergistic effect with the applied water-absorbing agent W, and is strongly bonded to the repair surface of the inner wall 2. On the surface of the regenerated surface layer portion X, portions corresponding to the filling portion 16 and the filling detecting portion 24 slightly protrude as described above, but have a substantially uniform smooth surface as a whole.

Next, the repair work is completed by applying the surface reinforcing material twice to the restoration reinforcing material after demolding, that is, the regenerated surface layer portion X of the inner wall, and attaching the footholding metal 5 after the surface reinforcing material is solidified. Will do. As a surface reinforcing material, a KA material (a trade name of Japan Zaipex CO., LTD.), Which is mainly composed of Portland cement, a silica compound or the like, and generates a cement crystal (CaSiO ₃ (nH ₂ O)), is used. You. The KA material has a material composition of 28 to 38% of SiO _{2 and} 3.8 to 4.8 of Al ₂ O ₃ .
%, Fe ₂ O ₃ 1.5-3.0%, CaO 25-34
%, MgO 3.0 to 5.0%, Na ₂ O 4.0 to 7.0
_%, With K 2 O0.25~0.99%, an effect of expanding concrete crystals. In other words, it can be said to be a cement-based crystal growth-type waterproofing material, which can repair concrete by penetrating cracks and the like while being applied, and can prevent deterioration of concrete. By applying the KA material twice to the regenerated surface layer portion X of the inner wall, a first surface reinforcement layer Y and a second surface reinforcement layer Z are formed as shown in FIG. The concrete crystal of the restoration reinforcing material is propagated by Y and Z, and the regenerated surface layer X of the inner wall is formed.
Is improved, and a waterproof structure having excellent water impermeability is formed.

As described above, the inner wall 2 of the deteriorated human hole shown in FIG. 12 is formed by press-fitting and filling a high-flow restoration material using the formwork 7 shown in FIG. Although repaired as shown, the regenerated inner wall 2 has the same strength and durability as the inner wall of a new human hole, and is regenerated to a structure capable of preventing sulfuric acid degradation by sulfur-oxidizing bacteria and the like. .

In the present embodiment, the filling section 1
Although the case of press-fitting / filling only from 6 has been described, after filling up to the filling detecting unit 24 at the intermediate height of the mold 7, press-fitting / filling may be performed from this filling detecting unit 24. That is,
Each gate valve 23, 2 of the filling section 16 and the filling detecting section 24
8 is closed, the supply pipe 20 is detached by operating the threaded pipe joint 21 from the filling section 16, and this supply pipe 20 is connected to the detection pipe 26 of the filling detection section. Is opened, and a press-fit pump (not shown) is operated. At that time, since the connection switching operation of the supply pipe 20 does not require much time and can be quickly refilled from the filling detection unit 24, it can be cast as a seamless integrated structure. Whether to press-fit or fill from the filling detection unit 24 is selected depending on the relationship between the viscosity of the restoration reinforcing material, the volume of the filling space S, the filling height, and the like and the performance of a press-fit pump (not shown). The filling detection unit 24 is provided on each of the mold members 8, 9, 10, and 11 of the mold 7, but the first-stage mold member 8 and the third-stage mold member 10, or the third-stage mold member It may be provided only on the member 10.

In the present embodiment, the manhole 1 of the sewage pipe system is repaired. However, the manhole of the rainwater pipe system can be repaired by installing the mold 7 in the same manner. In this case, the installation method of the mold 7 is partially different in the manhole of the rainwater pipe system sewerage facility because the mounting position of the inflow pipe 4 and the outflow pipe is at a high position away from the bottom 3 of the manhole. That is, when assembling the form members 8, 9, 10, 11 at the portions facing the inflow pipe 4 and the outflow pipe, the inflow pipe 4
A connecting pipe for temporarily connecting the connecting pipe and the outflow pipe is used. A hole for inserting the connecting pipe into the two form elements 15 at the above-mentioned opposed portions is made, and a connecting pipe is inserted into the hole of each form element 15. While the mold members 8, 9, 10, and 11 are assembled, and the ends of the connecting pipes are connected to the inflow pipe 4 and the outflow pipe by being inserted into the respective pipes. Then, the connection pipe, the inflow pipe 4, the outflow pipe, and each of the formwork elements 15 are sealed with the sealing material V. Of course, when installing the first step frame member 8, the sealing of the first step frame member 8 and the bottom 3 of the human hole with the sealing material V is the same as in the present embodiment. The two form elements 1
Numeral 5 is made of a plate material such as a wood plate or a resin plate, which is easily drilled. A continuous edge is formed around the plate, and these edges are connected to the adjacent form elements 15 by bolts. It may be as follows.

[0029]

According to the method for repairing human holes according to the present invention, since the restoration strengthening material is cast using the formwork, the finished surface is uniform, the construction period is short, the cost is low, and the construction is performed in a safe and hygienic manner. And the following effects are obtained. Highly fluid restoration reinforcing material is continuously pressed into and filled into the filling space from the lower side of the human hole, that is, from the bottom side. Since high pressure is applied to the material, mixing of air into the restoration reinforcing material is suppressed, and the restoration reinforcing material is cast in a compressed state. As a result, a dense and high-strength structure without cavities or seams can be repaired. Since the restoration reinforcing material has a high fluidity, it penetrates to every corner of the inner wall of the human hole, such as a crack, and is firmly bonded to the repair surface of the inner wall, so that the structure can be repaired to have a high strength. When a non-shrink grout material containing a bactericide is used as a restoration strengthening material, the action of the bactericide suppresses the generation of sulfuric acid, thereby preventing corrosion. Since the non-shrinkage grout material is solidified without shrinking, it is firmly bonded even at cracks etc. on the repaired surface of the inner wall and increases the strength,
It can repair a finished surface with good dimensional accuracy. When a surface reinforcement made of a cement-based crystal growth-type waterproofing material is applied, concrete crystals of the restoration-reinforcing material are multiplied, and the strength of the inner wall is increased, and the waterproof structure having excellent water impermeability can be repaired.

According to the apparatus for repairing human holes of the present invention, since the mold has a disassembled / assembled structure, the work of setting and removing the mold is easy and quick, the finished surface is uniform, the work period is short, Inexpensive,
It can be constructed in a health and safety manner and has the following effects. Since the filling part is provided on the lower side of the mold,
The restoration reinforcing material can be continuously press-fitted and filled from the lower side of the human hole, and the restoration reinforcing material pushes the air upward and discharges the air, and applies a high pressure to the restoration reinforcing material. As a result, it is possible to repair a dense and high-strength structure without cavities or seams. When the filling section is provided with a gate valve, the gate valve is closed after press-fitting and filling to prevent backflow of the filled restoration reinforcing material, so that the press-fitting means can be quickly removed from the mold. When the gate valve is provided so as to be slidable along the outer surface of the form, a projection is generated on the surface corresponding to the filling portion of the solidified restoration reinforcing material, but the protrusion is slightly smaller than the thickness of the form. It's just something. Thereby, at the time of demolding, the mold member provided with the filling portion can be easily disassembled and demolded in the same manner as other mold members. When the filling detection unit is provided, the placing operation can be performed while detecting the filling state, and the restoration reinforcing material can be appropriately filled without excess or shortage. The filling detector is a detection port, detection pipe, gate valve,
When a lid or the like having a filling detection hole is provided, the filling height can be easily detected by leaking the restoration reinforcing material from the detection tube or the detection hole. If a spacer is provided on the lid of the filling detection unit, the spacer will be attached and detached together with the lid, so the dimensions and mounting state of the spacer will be easily adjusted, and the formwork will be accurately set in place. I can do it. In addition, when the filling detection unit is filled, the lid is removed and the gate valve is closed to prevent the restoration reinforcing material from leaking from the filling detection unit. When each member of the filling detection unit has the same structure as the filling unit, the connection can be easily switched from the filling unit to the filling detection unit after filling at a predetermined height, and the filling detection unit can be used to quickly reconnect. Since filling is possible, even when press-fitting / filling exceeding the capacity of the press-fitting means is required, it can be easily handled without changing the press-fitting means.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of a human hole repairing method of the present invention, and is a cross-sectional view in a state where a mold is installed in a human hole.

FIG. 2 is a front view of a mold used in the embodiment of the human hole repairing method of the present invention.

FIG. 3 is an enlarged sectional view taken along the line CC of FIG. 2 and shows a structure for assembling a mold and a structure for a filling portion.

FIG. 4 is an enlarged sectional view taken along line AA of FIG. 1, showing a relationship between an inner wall of a human hole, a mold, a filling unit, and a filling detection unit.

FIG. 5 is a plan sectional view of a filling section shown in FIG. 3;

FIG. 6 is a front view of a filling unit shown in FIG.

FIG. 7 is an enlarged sectional view taken along the line BB of FIG. 1, showing a relationship between an inner wall of a human hole, a mold, and a filling detection unit.

FIG. 8 is a plan sectional view of the filling detection unit shown in FIG. 7;

FIG. 9 is a front view of the filling detection unit shown in FIG. 7;

FIG. 10 is a sectional view of a human hole repaired by an embodiment of the human hole repair method of the present invention.

FIG. 11 is an explanatory view of the inner wall structure of the human hole shown in FIG. 10, showing a part of the inner wall in an enlarged sectional view.

FIG. 12 is a cross-sectional view of an old human hole in a conventional sewage pipe sewer system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 person hole 2 inner hole of person hole 7 form 8 first stage form member 9 second stage form member 10 third stage form member 11 fourth stage form member 16 filling section 17 filling port 18 filling tube 19 filling Mounting flange 20 supply pipe 21 threaded pipe joint 22 press-fit pump supply hose 23 filling section gate valve 24 filling detection section 25 detection port 26 detection pipe 27 filling detection section mounting flange 28 filling detection section separation valve 29 lid Body 30 Spacer 31 Nut 32 Detection hole S Filling space V Sealing material W Water-absorbing agent X Regenerated surface layer of inner wall Y First surface reinforcing material layer Z Second surface reinforcing material layer

Claims (8)

[Claims] 1. A method for cleaning and deteriorating a surface layer portion degraded from an inner wall (2).
After removal and preparatory treatment, a manhole repair method is used to regenerate the manhole (1) by placing a cement-based restoration reinforcing material on the inner wall (2). It is installed concentrically with the inner wall (2), and is made of high-flow cement-based restoration reinforcing material (2).
The filling space (S) defined by the repair surface of the mold and the inner surface of the mold (7) is press-fitted and filled from the outside of the mold (7) below the human hole (1), thereby forming the inner wall ( 2) A method for repairing human holes, which comprises placing a cement-based restoration reinforcing material. 2. The method for repairing human holes according to claim 1, wherein the cement-based restoration reinforcing material is a non-shrinkage grout material mixed with a bactericidal agent against sulfur oxidizing bacteria. 3. The cement-based restorative reinforcing material is solidified and demolded, and then a surface reinforcing material made of a cement-based crystal growth-type waterproofing material is applied to the surface of the regenerated surface layer (X) on the inner wall. Manhole repair method described. 4. When repairing the deteriorated inner wall (2), a cylindrical mold (7) is installed concentrically with the inner wall (2) by an assembling / disassembling structure, and the repair surface of the inner wall (2) and the mold are repaired. The high-fluid cement-based restoring reinforcing material is press-fitted and filled into the filling space (S) defined by the inner surface of the frame (7) by the press-fitting means, so that the cement-based restoring reinforcing material is applied to the inner wall (2). An apparatus for repairing a human hole to be cast, in which a cement-based restoration reinforcing material is press-fitted into a form (7) from the outside of the form (7) below the human hole (1) into a filling space (S). A human hole repairing device provided with a filling portion (16) that performs filling. 5. A filling portion (16) is formed in the form (7) so as to penetrate therethrough, and communicates with the fill opening (17) to project outside the form (7). The manhole repair according to claim 4, further comprising a filling pipe (18) provided for connecting the press-fitting means, and a gate valve (20) for communicating and blocking the filling port (17) and the filling pipe (18). apparatus. 6. The mold (7) is provided with a filling detecting section (24) for detecting a filling height of the cement-based restoration reinforcing material,
The filling detection section (24) is provided with a detection port (25) formed through the form (7) in a penetrating manner, and a detection port provided in communication with the detection port (25) and protruding outside the form (7). A tube (26);
The human hole repairing device according to claim 4 or 5, further comprising a gate valve (28) for connecting / disconnecting the detection port (25) and the detection pipe (26). 7. A filling detector (24) includes a detection tube (26).
7. A lid (29) is detachably provided on the free end side of the cover, and a detection hole (32) is formed in the lid (29) so that the filled cement-based restoration reinforcing material leaks. A repair device for a human hole according to the above. 8. A lid (29) is provided with a spacer (30) for holding the formwork (7) at a predetermined distance from the inner wall (2), and the lid (29) is attached to the detection tube (26). The manhole repair according to claim 7, wherein one end of the spacer (30) abuts on the repair surface of the inner wall (2) to hold the formwork (7) concentrically with the inner wall (2). apparatus.